/**
 * Copyright 2021 Huawei Technologies Co., Ltd
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef MINDSPORE_CCSRC_FRONTEND_OPTIMIZER_AUTO_MONAD_ELIMINATOR_H_
#define MINDSPORE_CCSRC_FRONTEND_OPTIMIZER_AUTO_MONAD_ELIMINATOR_H_

#include "ir/anf.h"
#include "ir/manager.h"
#include "frontend/optimizer/optimizer.h"

namespace mindspore {
namespace opt {
class AutoMonadEliminator {
 public:
  AutoMonadEliminator() = default;
  virtual ~AutoMonadEliminator() = default;

  bool operator()(const FuncGraphPtr &root, const OptimizerPtr &optimizer) const {
    auto manager = optimizer->manager();
    MS_EXCEPTION_IF_NULL(manager);
    manager->AddFuncGraph(root);

    // Never report change.
    (void)ReplaceAutoMonadNode(manager);
    (void)EliminateAutoMonadNode(manager);
    return false;
  }

 private:
  bool ReplaceAutoMonadNode(const FuncGraphManagerPtr &manager) const;
  bool EliminateAutoMonadNode(const FuncGraphManagerPtr &manager) const;
};
}  // namespace opt
}  // namespace mindspore

#endif  // MINDSPORE_CCSRC_FRONTEND_OPTIMIZER_AUTO_MONAD_ELIMINATOR_H_
